Comprehensive Assessment Of Information Systems And Decision Support Models Practice Tests

Question 1

A retail firm processes $N$ daily transactions. If the Transaction Processing System (TPS) handles $T$ transactions per second and the Decision Support System (DSS) requires a data aggregation factor of $A$ to analyze trends, calculate the total daily data volume $V$ in bytes if each transaction is $S$ bytes and the DSS processes a summary of $P$ percent of total transactions. The formula is $V = (N 	imes S) + (N 	imes P 	imes S)$. Determine the total volume if $N = 10000$, $S = 512$ bytes, and $P = 0.10$.

Accepted Answer

5,632,000 bytes

Answer

5,120,000 bytes

Answer

6,144,000 bytes

Answer

512,000 bytes

Question 2

In a cloud database, the probability of a security breach affecting Confidentiality, Integrity, or Availability is defined by the independent probabilities $P(C) = 0.02$, $P(I) = 0.01$, and $P(A) = 0.05$. Calculate the probability that at least one of these components is compromised, assuming independence: $P(Total) = 1 - ((1 - P(C)) 	imes (1 - P(I)) 	imes (1 - P(A)))$.

Accepted Answer

0.07789

Question 3

A company evaluates the scalability of a cloud system. If the initial processing capacity is $C_0$ and it grows at a rate $r$ per month, the capacity after $t$ months is $C(t) = C_0 e^{rt}$. If $C_0 = 100$ units and $r = 0.05$, determine the capacity after $t = 12$ months.

Accepted Answer

Option A

Answer

Option B

Answer

Option C

Answer

Option D

Question 4

If an MIS generates an Exception Report for inventory levels where the current stock $S$ falls below the safety threshold $T_{min}$ defined as $S < T_{min}$, and $S = 50$ while $T_{min} = 60$, the system should trigger an alert.

Accepted Answer

True

Answer

False

Question 5

An organization uses an MIS to track sales efficiency. The efficiency ratio $E$ is calculated as $E = \frac{	ext{Revenue}}{	ext{Operating Costs}}$. If Revenue increases by $10\%$ and Operating Costs increase by $5\%$, what is the new efficiency ratio $E_{new}$ in terms of the original ratio $E_{old}$?

Accepted Answer

Option A

Answer

Option B

Answer

Option C

Answer

Option D

Question 6

A project manager estimates the time to implement an MIS using the PERT method. If the optimistic time $O = 4$ weeks, most likely time $M = 6$ weeks, and pessimistic time $P = 14$ weeks, calculate the expected time $T_e$ using the formula $T_e = \frac{O + 4M + P}{6}$.

Accepted Answer

7 weeks

Question 7

Which of the following scenarios represent valid applications of MIS reporting types? (Select all that apply)

Accepted Answer

Option A

Answer

Option B

Answer

Option C

Answer

Option D

Question 8

In a system integration project, the total cost $C$ is modeled by $C = F + vQ$, where $F$ is fixed cost, $v$ is variable cost per user, and $Q$ is the number of users. If $F = €50000$, $v = €200$, and the budget is €150000, solve for the maximum number of users $Q$ the system can support.

Accepted Answer

Option A

Answer

Option B

Answer

Option C

Answer

Option D

Question 9

In the context of the SDLC, if the cost of fixing a defect in the maintenance phase is $C_m$ and the cost in the design phase is $C_d$, it is generally observed that $C_m > C_d$.

Accepted Answer

True

Answer

False

Question 10

A company calculates the ROI of an MIS implementation. If the initial investment is €200000 and the annual net gain is €50000 for 5 years, calculate the total ROI percentage using the formula $ROI = \frac{(	ext{Total Gain} - 	ext{Investment})}{	ext{Investment}} 	imes 100$.

Accepted Answer

25%

Question 11

Given a document vector $D = [1, 2, 0]$ and a query vector $Q = [0, 1, 1]$, calculate the cosine similarity $sim(D, Q) = \frac{D \cdot Q}{\|D\| \|Q\|}$.

Accepted Answer

0.447

Answer

0.632

Answer

0.500

Answer

0.816

Question 12

A search system retrieves 10 documents for a query. If 4 of these are relevant, and there are a total of 8 relevant documents in the collection, calculate the Recall of the system.

Accepted Answer

0.5

Question 13

In the context of the BM25 probabilistic model, how does the term frequency saturation parameter $k_1$ affect the scoring function $S(Q, D) = \sum_{q \in Q} 	ext{IDF}(q) \cdot \frac{f(q, D) \cdot (k_1 + 1)}{f(q, D) + k_1 \cdot (1 - b + b \cdot \frac{|D|}{	ext{avgdl}})}$?

Accepted Answer

It limits the influence of high term frequency in a document.

Answer

It increases the weight of rare terms exponentially.

Answer

It normalizes the document length against the average document length.

Answer

It acts as a binary switch for the Boolean model.

Question 14

In neural information retrieval using transformer architectures like BERT, the model captures semantic context by representing queries and documents as dense vectors in a shared latent space, allowing for retrieval even when no exact keyword matches exist.

Accepted Answer

True

Answer

False

Question 15

Which of the following metrics are commonly used to evaluate the ranking quality of an IR system where the order of results is critical?

Answer

Precision

Answer

Recall

Answer

Mean Average Precision (MAP)

Answer

Normalized Discounted Cumulative Gain (NDCG)

Question 16

Given a ranked list of 5 results where the relevance labels are [1, 0, 1, 1, 0] (1 for relevant, 0 for not), calculate the Precision at rank 3 ($P@3$).

Accepted Answer

0.66

Question 17

A system requires a decision table for an automated loan approval process based on 4 binary conditions: Credit Score, Employment Status, Debt-to-Income Ratio, and Collateral. Calculate the total number of unique rules ($N$) required to represent all possible combinations of these conditions.

Accepted Answer

16

Answer

4

Answer

8

Answer

32

Question 18

Consider a grading system with two conditions: 'Attendance $\geq$ 75%' (Y/N) and 'Exam Score $\geq$ 50' (Y/N). If the action 'Pass' is taken only when both conditions are Y, and 'Fail' otherwise, how many rules in the decision table can be simplified using a 'don't care' (-) condition to represent the 'Fail' outcome?

Accepted Answer

3

Question 19

Which of the following scenarios are best represented by an Extended-Entry decision table rather than a Limited-Entry table?

Answer

Categorizing a customer into 'Junior', 'Adult', or 'Senior' based on age

Answer

Assigning a shipping cost based on weight ranges: 0-5kg, 5-20kg, and >20kg

Answer

Determining if a user is logged in (True/False)

Answer

Checking if a payment transaction is successful (Yes/No)

Question 20

In a decision table with $n$ binary conditions, if we identify that certain actions are independent of specific conditions, we can reduce the number of rules below $2^n$ by using 'don't care' entries.

Accepted Answer

True

Answer

False

Comprehensive Assessment Of Information Systems And Decision Support Models Practice Tests

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Comprehensive Assessment of Information Systems and Decision Support Models

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