Multiple choice technology programming languages

data a; do X=1 to 3 ; input ID NAME $ AGE; end; datalines; 01 vivek 22 02 vital 25 03 rajes 20 ; What will be the number of observations and variables in output dataset??

  1. 3 and 3

  2. 1 and 3

  3. 1 and 4

  4. 3 and 1
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The DO loop (X=1 to 3) iterates 3 times, but the data step only creates one observation because the OUTPUT statement is missing. The loop reads 3 lines of data but overwrites the same variables. The output dataset has 1 observation with 4 variables: X (from the loop), ID, NAME, and AGE.

AI explanation

To determine the number of observations and variables in the output dataset, let's go through the given code step by step.

The code snippet data a; initializes a dataset named "a".

The do X=1 to 3; statement starts a loop that iterates from 1 to 3.

Within the loop, the input ID NAME $ AGE; statement reads three variables from the input data: ID (numeric), NAME (character), and AGE (numeric).

The end; statement marks the end of the loop.

The datalines; statement indicates that the input data is provided in the following lines.

The input data is given as:

01 vivek 22 02 vital 25 03 rajes 20

From the input data, we can see that there are 3 observations and 3 variables (ID, NAME, AGE).

Therefore, the correct answer is:

C) 1 and 4

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