EDPT Flowchart Interpretation 5

Question 1

A flowchart reads a sequence of numbers until a sentinel value of -1 is entered. The loop condition is 'Number ≠ -1'. Where is the sentinel check placed in a While-type loop?

Accepted Answer

Before the process block

Answer

In a While loop, the condition is checked before the process block so the body never executes if the first input is the sentinel.

Question 2

A flowchart uses a cylinder symbol. What does this represent?

Accepted Answer

A stored data file or database

Answer

A cylinder (drum) shape represents stored data, typically a database or disk storage.

Question 3

Trace this logic: X=10, Y=3. Step 1: R = X mod Y. Step 2: X = Y. Step 3: Y = R. Step 4: If Y ≠ 0 go to Step 1. What is X when the loop ends?

Accepted Answer

1

Answer

This is the Euclidean algorithm: 10 mod 3=1, then 3 mod 1=0, loop ends with X=1, which is the GCD.

Question 4

A flowchart has a decision: 'Is List Empty?' with Yes going to End and No going to process the next item. What problem does this guard prevent?

Accepted Answer

Processing an empty list causing errors

Answer

Checking if the list is empty before processing prevents errors that would occur when trying to read from an empty data structure.

Question 5

A flowchart assigns grades: if score ≥ 60 output 'Pass', else output 'Fail', then always output 'Done'. For a score of 45, what is the complete output?

Accepted Answer

Fail, Done

Answer

A score of 45 is below 60, so 'Fail' is output, then the unconditional 'Done' step always executes after the decision.

EDPT - Electronic Data Processing Test Practice Test

EDPT - Electronic Data Processing Test Practice Test

EDPT Flowchart Interpretation 5