Staff Selection Commission Multi Tasking Staff Exam
Question : Comprehension: In the following passage, some of the words have been deleted. Read the passage carefully and select the correct answer for the given blank out of the four alternatives. Network security (1) ______ securing a network and protecting the user’s information about (2) ______ is connected through that network. Over the network, (3) ______ steal, the packets of data through sniffing and spoofing (4) ______, man in the middle attack, wardriving, etc, and misuse the data for their (5) ______. Question: Select the most appropriate option to fill in the blank number 1.
Option 1: calls
Option 2: names
Option 3: means
Option 4: declares
Correct Answer: means
Solution : The correct option will be the third option.
The use of the word "means" makes the sentence coherent by suggesting that network security involves the means of securing a network and protecting user information.
The complete sentence would be: "Network security means securing a network
Question : The simple interest on a sum of money at 10% per annum for 2 years is 8,100. Compounded annually, what would be the compound interest (in ) on the same sum for the same period at the same rate of interest?
Option 1: 8,100
Option 2: 8,505
Option 3: 8,715
Option 4: 9,000
Correct Answer: 8,505
Solution : Simple interest = $\frac{\text{Principal × Rate × Time}}{100}$ According to the question $⇒ 8100 = \frac{\text{Principal}×10×2}{100}$ $\therefore$ Principal $= 40500$ Now, $\text{Total Amount}$ $=\text{Principal}×(1+\frac{\text{Rate}}{100})^{\text{Time}}$ $ = 40500({1+ \frac{10}{100})^2}$ $ = 40500({ \frac{11}{10})^2}$ $ = 40500×{ \frac{121}{100}}$ $=49005$ $\therefore$ Compound Interest = Amount – Principal =
Question : Find the part of the given sentence that has an error in it. If there is no error, choose 'No Error'.
Despite of technological innovations and powerful analytical tools, nothing is happening.
Option 1: and powerful analytical tools,
Option 2: despite of technological innovations
Option 3: nothing is happening
Option 4: No Error
Correct Answer: despite of technological innovations
Solution : The correct choice is the second option.
The error in the original sentence was the use of despite of. The word despite is a preposition that already carries the meaning of in spite of or regardless of. The correct structure
Question : A trader marks his goods at 55% above the cost price and allows a discount of 20%. What is his gain percentage?
Option 1: 24%
Option 2: 18%
Option 3: 22%
Option 4: 16%
Correct Answer: 24%
Solution : Let the cost price be 100. The marked price is 55% above the cost price = 155 After allowing a discount of 20%, selling price = $\frac{80}{100}\times155=124$ Profit = Selling price – Cost price = 124 – 100 = 24 Profit percentage = $\frac{\text{Profit}}{\text{Cost price}}\times100=\frac{24}{100}\times100=24$%
Question :
Directions: In the following question, you have to identify the correct response from the given premises stated according to the following symbols. If – means addition, + means subtraction, × means division, and ÷ means multiplication, then 7 – 10 × 5 ÷ 6 + 4 = ?
Option 1: 3
Option 2: 12
Option 3: 15
Option 4: 9
Correct Answer: 15
Solution : Given: – means addition, + means subtraction, × means division, and ÷ means multiplication. 7 – 10 × 5 ÷ 6 + 4 = ?
After replacing the symbols as per the information provided, the equation becomes – = 7 + 10 ÷ 5 ×
Question : Tina can do a work in 15 days and Manya can do the same work in 18 days. If they worked for 6 days, then what is the fraction of work is left?
Option 1: $\frac{4}{15}$
Option 2: $\frac{8}{15}$
Option 3: $\frac{11}{15}$
Option 4: $\frac{11}{30}$
Correct Answer: $\frac{4}{15}$
Solution : One day work of Tina = $\frac{1}{15}$ One day work of Manya = $\frac{1}{18}$ One day work of Tina and Manya = $\frac{1}{15}+\frac{1}{18}$ = $\frac{6+5}{90}$ = $\frac{11}{90}$ Six day work of Tina and Manya = $\frac{11}{90}\times6$ = $\frac{11}{15}$ Remaining work = $(1-\frac{11}{15})$ = $\frac{4}{15}$ Hence,
Question : Directions: Select the number from among the given options that can replace the question mark (?) in the following series. 6, 11, 21, 41, 81, ?
Option 1: 241
Option 2: 151
Option 3: 161
Option 4: 240
Correct Answer: 161
Solution : Given: 6, 11, 21, 41, 81, ?
The pattern is as follows – (6 × 2) – 1 = 12 – 1 = 11 (11 × 2) – 1 = 22 – 1 = 21 (21 × 2) – 1 = 42 – 1 =
Question : Directions: If a mirror is placed on line AB, then which of the answer figures is the right image of the given figure?
Option 1:
Option 2:
Option 3:
Option 4:
Correct Answer:
Solution : As per mirror image properties, closer things appear close to the mirror in reflection. According to the information provided, the mirror is placed at the right of the figure (on line AB). So, the right of the reflected image will appear as its left, and the
Question : The following pie chart shows the sectors representing the shares of the number of electric buses manufactured in each of 7 different colours in a given year in terms of the central angles (in degrees) with respect to the total number of buses manufactured during that year of all the 7 colours taken together. What is the difference in the percentage shares of buses of $\mathrm{C} 4$ and $\mathrm{C} 6$? [Give your answer correct to 2 decimal places.]
Option 1: 11.11%
Option 2: 8.33%
Option 3: 9.09%
Option 4: 12.5%
Correct Answer: 8.33%
Solution : From the given pie- chart, C4 = 48° C6 = 18° We know, Percentage = $\frac{\text{Given Angle}}{360°}\times 100$ Percentage of C4 = $\frac{48°}{360°}\times100$ = 13.33% Percentage of C6 = $\frac{18°}{360°}\times100$ = 5% Difference = 13.33% – 5% = 8.33% Hence, the correct answer is 8.33%.
Question : A dealer marks his goods at 44% above the cost price. Then he allows 50% discount on it. What would be his loss percentage?
Option 1: 25%
Option 2: 28%
Option 3: 26%
Option 4: 32%
Correct Answer: 28%
Solution : Let the cost price be 100. Marked price above 44% = 144 Discount = 50% Selling price = $\frac{\text{Discount}}{100}\times$ Marked price = $\frac{50}{100}\times144$ = 72 Loss = cost price – selling price = 100 – 72 = 28 Loss percent = $\frac{\text{Loss}}{\text{Cost price}}\times100$% = $\frac{28}{100}\times100$%
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