SAS Institute A00-231 問題練習

Question No : 1
SIMULATION
Scenario:
This project will use data set cert.input13. At any time, you may save your program as program13 in cert\programs.
This data set contains 1001 observations and 2 variables:
o Date1, a numeric variable representing an unformatted SAS date value. Example: 12001.
o Charnum, a character variable representing a monetary
amount. Example: $50,000.
Write a SAS program that will:
o Save the new data set as results.output13.
o Create a new variable Chdate that converts the datel variable to a character variable that is in the format ddmonyyyy, such as 11NOV1992.
o Create a new variable num1 that converts the Charnum variable to a numeric variable.
What is the average (mean) of the num1 variable for the entire data set?
Enter your numeric answer in the space below (Round your answer to the nearest integer).

答えを確認する

正解: 51763
Explanation:
data results.output13;
set cert.input13;
Chdate=put(date 1,date9.);
num 1=input(Charnum,dollar7.);
run;
proc means data=results.output13;
var num 1;
run;

Question No : 2
SIMULATION
Scenario:
This project will use data set cert.input13. At any time, you may save your program as program13 in cert\programs.
This data set contains 1001 observations and 2 variables:
o Date1, a numeric variable representing an unformatted SAS date value. Example: 12001.
o Charnum, a character variable representing a monetary amount. Example: $50,000.
Write a SAS program that will:
o Save the new data set as results.output13.
o Create a new variable Chdate that converts
the datel variable to a character variable that is in the format ddmonyyyy, such as 11NOV1992.
o Create a new variable num1 that converts the Charnum variable to a numeric variable.
What is the value ofChdatefor observation 52?

答えを確認する

正解: 30DEC1992
Explanation:
data results.output13;
set cert.input13;
Chdate=put(date 1,date9.);
num 1=input(Charnum,dollar7.);
run;
proc print data=results.output13 (firstobs=52 obs=52);
run;

Question No : 3
SIMULATION
Scenario:
This project will use data set cert.input12. At any time, you may save your program as program12 in cert\programs.
cert.input12 contains a single observation with two variables:
o salary o year
Write a SAS program that will:
o Create an output data set results.output12.
o Read cert.input12 as input.
o Increase the salary variable by 5.65% annually until it is greater than $500,000.
o Increment the year variable by 1 with each annual increase.
o Create an output data set results.output12 that has one observation for each value of year. Each observation should have a year and salary variable.
What is the value of year when the above salary occurs? Enter your numeric answer in the space below.

答えを確認する

正解: 2027
Explanation:
data results.output12;
set cert.input12;
do until (salary gt 500000);
salary=salary*1.0565;
year+1;
output;
end;
run;
proc print data=results.output 12;
run;

Question No : 4
SIMULATION
Scenario:
This project will use data set cert.input12. At any time, you may save your program as program12 in cert\programs.
cert.input12 contains a single observation with two variables:
o salary o year
Write a SAS program that will:
o Create an output data set results.output12.
o Read cert.input12 as input.
o Increase the salary variable by 5.65% annually until it is greater than $500,000.
o Increment the year variable by 1 with each annual increase.
o Create an output data set results.output12 that has one observation for each value of year. Each observation should have a year and salary variable.
What is the maximum salary hat is less than $500,000? Enter your numeric answer in the space below (Round your answer to the nearest integer)

答えを確認する

正解: 498737
Explanation:
data results.output12;
set cert.input12;
do until (salary gt 500000);
salary=salary*1.0565;
year+1;
output;
end;
run;
proc print data=results.output 12;
run;

Question No : 5
SIMULATION
Scenario:
This project will use data set cert.input08a and cert.input08b. At any time, you may save your program as program08 in cert\programs.
Both data sets contain a common numeric variable named ID.
Write a program that will use a SAS DATA Step to:
o Combine data sets cert.input08a and cert.input08b by matching values of the ID variable.
o Write only observations that are in both data sets to a new data set named results.match08.
o Write all other non-matching observations from either data set to a new data set named results.nomatch08. o Exclude all variables that begin with "ex" from results.nomatch08.
How many variables (columns) are in _______________ results.nomatch08
Enter your numeric answer in the space below:
Save your program as ______________ program08.sas in folder cert programs before continuing with the next project.

答えを確認する

正解: 5
Explanation:
SAS code that could be used to solve this project:
Proc
sort data=cert.input08a out=work.input08a;
by ID;
run;
proc sort data=cert.input08b out=work.input08b;
by ID;
run;
data results.match08 results.nomatch08 (drop=ex: );
merge work.input08a (in=a) work.input08b (in=b);
by ID;
if a and b then output results.match08;
else output results.nomatch08;
run;
proc contents data=results.match08;
run;
proc contents data=results.nomatch08;
run;
The correct answer is: 5

Question No : 6
SIMULATION
Scenario:
This project will use data set cert.input08a and cert.input08b. At any time, you may save your program as program08 in cert\programs.
Both data sets contain a common numeric variable named ID.
Write a program that will use a SAS DATA Step to:
o Combine data sets cert.input08a and cert.input08b by matching values of the ID variable.
o Write only observations that are in both data sets to a new data set named results.match08.
o Write all other non-matching observations from either data set to a new data set named results.nomatch08.
o Exclude all variables that begin with "ex" from results.nomatch08.
How many observations (rows) are inresults.nomatch08?

答えを確認する

正解: 2
Explanation:
proc sort data=cert.input08b out=work.input08b;
by ID;
run:
SAS code that could be used to solve this project:
proc sort data=cert.input08a out=work.input08a;
by ID;
run:
data results.match08 results.nomatch08 (drop=ex: );
merge work.input08a (in=a) work.input08b (in=b);
by ID;
if a and b then output results.match08;
else output results.nomatch08;
run;
proc contents data=results.match08;
run;
proc contents data=results.nomatch08;
run;
The correct answer is: 2

Question No : 7
SIMULATION
Scenario:
This project will use data set cert.input08a and cert.input08b. At any time, you may save your program as program08 in cert\programs.
Both data sets contain a common numeric variable named ID.
Write a program that will use a SAS DATA Step to:
o Combine data sets cert.input08a and cert.input08b by
matching values of the ID variable.
o Write only observations that are in both data sets to a
new data set named results.match08.
o Write all other non-matching observations from either data set to a new data set named results.nomatch08. o Exclude all variables that begin with
"ex" from results.nomatch08.
How many variables (columns) are in results.match08

答えを確認する

正解: 117
Explanation:
proc sort data=cert.input08b out=work.input08b;
by ID;
run:
data results.match08 results.nomatch08 (drop=ex: );
merge work.input08a (in=a) work.input08b (in=b);
by ID;
if a and b then output results.match08;
else output results.nomatch08;
run;
proc contents data=results.match08;
SAS code that could be used to solve this project:
proc
sort data=cert.input08a out=work.input08a;
by ID;
run:
run;
proc contents data=results.nomatch08;
run;
The correct answer is: 117

Question No : 8
SIMULATION
This project will use data set cert.input08a and cert.input08b. At any time, you may save your program as program08 in cert\programs.
Both data sets contain a common numeric variable named ID.
Write a program that will use a SAS DATA Step to:
o Combine data sets cert.input08a and cert.input08b by
matching values of the ID variable.
o Write only observations that are in both data sets to a
new data set named results.match08.
o Write all other non-matching observations from either data set to a new data set named results.nomatch08. o Exclude all variables that begin with
"ex" from results.nomatch08.
How many observations (rows) are inresults.match08?
Enter your numeric answer in the space below:

答えを確認する

正解: 1200
Explanation:
SAS code that could be used to solve this project:
proc sort data=cert.input08a out=work.input08a;
by ID;
run;
proc sort data=cert.input08b out=work.input08b;
by ID;
run;
data results.match08 results.nomatch08 (drop=ex: );
merge work.input08a (in=a) work.input08b (in=b);
by ID;
if a and b then output results.match08;
else output results.nomatch08;
run;
proc contents data=results.match08;
run:
proc contents data=results.nomatch08;
run;
The correct answer is: 1200

Question No : 9
SIMULATION
Scenario:
This project will use data setcert.input04. At any time, you may save your program asprogram04incert\programs. Write a SAS program that will create the data setresults.output04.
In this program, complete the following mathematical actions, in the following order:
Round VAR1 and VAR2 to the nearest integer values.
Multiply the rounded VAR1b y the rounded VAR2 and assign the new value to VAR3.
Add VAR12 through VAR19 (8 variables) together, ignoring missing values. Assign the sum to VAR20.
For observation 16, what is the value ofVAR20? Enter your numeric answer in the space below. Round your answer to the nearest whole number. Save your program asprogram04.sasincert\programs before continuing with the next project

答えを確認する

正解: 3175
Explanation:
SAS code that could be used to solve this project:
data results.output04;
set cert.input04;
var3=round(var1,1)*round(var2,1);
var20=sum(of var12-var19);
run;
proc print data=results.output04 (obs=16 firstobs=16);
var var3 var20;
run;
If you got this question wrong because you didn't round to the nearest whole number, please know that the actual exam will restrict you to entering only a whole number to prevent this from occurring. The correct answer is: 3175

Question No : 10
SIMULATION
Scenario:
This project will use data setcert.input04. At any time, you may save your program asprogram04incert\programs. Write a SAS program that will create the data setresults.output04.
In this program, complete the following mathematical actions, in the following order:
Round VAR1 and VAR2 to the nearest integer values.
Multiply the rounded VAR1b y the rounded VAR2 and assign the new value to VAR3.
Add VAR12 through VAR19 (8 variables) together, ignoring missing values. Assign the sum to VAR20.
For observation 16, what is the value ofVAR3? Enter your numeric answer in the space below:

答えを確認する

正解: 80136
Explanation:
SAS code that could be used to solve this project:
data results.output04;
set cert.input04;
var3=round(var1,1)*round(var2,1);
var20=sum(of var12-var19);
run;
proc print data=results.output04 (obs=16 firstobs=16);
var var3 var20;
run;
The 'obs' option controls the last observation SAS processes. If you set obs=16, SAS would read and process only up to the 16th observation in the data set.
The 'firstobs' option controls the starting observation. If you set firstobs=16, SAS would start reading and processing from the 16th observation