EDPT - Electronic Data Processing Data Sufficiency Analysis Questions and Answers

Question 1

Two servers, A and B, are processing a large dataset. How many hours would it take Server A to process the dataset by itself?

(1) Working together, Server A and Server B can process the dataset in 8 hours.
(2) Server B processes data at a rate that is one-third the rate of Server A.

Accepted Answer

BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

Answer

To find the time it takes Server A alone, we need a specific value for its processing rate. Statement (1) gives us a combined rate equation (1/A + 1/B = 1/8), but with two variables, it's insufficient. Statement (2) gives a relationship between the rates (B = 3A, in terms of time), but no specific values, so it is also insufficient. However, by combining the two statements, we can substitute the relationship from (2) into the equation from (1) to create a single-variable equation (1/A + 1/(3A) = 1/8) and solve for A.

Question 2

A data processing program was run 5 times. What was the average execution time in seconds?

(1) The total execution time for all 5 runs was 210 seconds.
(2) The execution times, in seconds, for the first 3 runs were 42, 45, and 38.

Accepted Answer

Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

Answer

The average is calculated by dividing the total time by the number of runs. Statement (1) provides the total time (210 seconds) and the question provides the number of runs (5). This is sufficient to calculate the average (210 / 5 = 42 seconds). Statement (2) only provides data for 3 of the 5 runs, which is not enough to calculate the overall average.

Question 3

A rectangular data center floor has a specific footprint. What is the perimeter of the floor in meters?

(1) The area of the floor is 48 square meters.
(2) The diagonal length of the floor is 10 meters.

Accepted Answer

BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

Answer

Let L be length and W be width. The perimeter is 2(L+W). Statement (1) gives L*W = 48. This is not sufficient, as the dimensions could be 6x8 (perimeter 28) or 4x12 (perimeter 32). Statement (2) gives L^2 + W^2 = 10^2 = 100 (from Pythagorean theorem). This is also not sufficient. Combining both, we have a system of two unique equations with two variables: L*W=48 and L^2+W^2=100. We can solve this system to find unique values for L and W (which are 6 and 8), and thus find a unique perimeter.

Question 4

A database query is run multiple times. What is the median query execution time?

(1) The query was run 7 times and the average execution time was 50 milliseconds.
(2) The set of execution times has a single mode of 52 milliseconds.

Accepted Answer

Statements (1) and (2) TOGETHER are NOT sufficient to answer the question.

Answer

The median is the middle value in an ordered set of numbers. Statement (1) gives the average and the count, but this doesn't determine the middle value. For example, the set {10, 20, 30, 50, 70, 80, 90} has an average of 50 and a median of 50. But the set {47, 48, 49, 50, 51, 52, 53} also has an average of 50 and a median of 50. Wait, a better counterexample: {1, 1, 1, 50, 99, 99, 99} has an average of 50 and a median of 50. But {40, 45, 48, 50, 52, 55, 60} also has an average of 50 and a median of 50. Knowing the average is not sufficient. Statement (2) tells us the most frequent value (mode), which provides no information about the middle value. Combining the statements does not provide enough information to determine the specific values in the set, and therefore the median cannot be found.

Question 5

In a group of 50 network engineers, how many are certified in both Cisco (CCNA) and Juniper (JNCIA)?

(1) 35 engineers are certified in CCNA.
(2) 10 engineers in the group are certified in neither CCNA nor JNCIA.

Accepted Answer

Statements (1) and (2) TOGETHER are NOT sufficient to answer the question.

Answer

Let C be CCNA certified, J be JNCIA certified, and B be both. The formula for overlapping sets is Total = C + J - B + Neither. Statement (1) gives C=35, so 50 = 35 + J - B + Neither. There are too many unknowns. Statement (2) gives Neither=10, so 50 = C + J - B + 10, or 40 = C + J - B. This is also not sufficient. Combining the two statements gives us 40 = 35 + J - B. We still have two unknowns (J and B) and cannot solve for the number certified in both.

EDPT - Electronic Data Processing Test Practice Test

EDPT - Electronic Data Processing Test Practice Test

EDPT - Electronic Data Processing Data Sufficiency Analysis Questions and Answers