Question
A boat goes 5 km an hour in still water, but takes twice
as much time in going the same distance against the current. The speed of the current (in km/hour) is :Solution
Let the speed of the current be x kmph. According to the question, 5/(5 – x) = 2 ⇒ 10 – 2x = 5 ⇒ 2x = 10 – 5 ⇒ x = 5/2 = 2.5 km/hr
A company collects sales data from different regions, but the "Revenue" column uses inconsistent currency formats (USD, EUR, INR). What is the best appr...
Which of the following protocols is widely used for low-power, short-range communication in IoT devices?
In time series analysis, the Dickey-Fuller test is used to:
A company wants to analyze customer reviews by categorizing them as “Positive,” “Neutral,” or “Negative.” What type of data are these catego...
When performing trend analysis for forecasting sales, which of the following methods is most commonly used to identify future trends based on historical...
Which of the following best represents semi-structured data?
Which of the following SQL queries will return the second highest salary from a table Employee with columns Name and Salary?
To reduce bias in a sampling process, which of the following strategies is most effective?
What will be the output of the following C code?
#include < stdio.h >
void main ( ) {
int x = 10, y = 20, *p1 = &x, *p2 = &y;...
What will be the output of the following Python code?
def modify_list(lst):
for i in range(len(lst)):
lst[i] = ls...
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