Question
Which of the following Excel functions is most
appropriate for dynamically summarizing data from multiple tables by matching a key value?Solution
VLOOKUP (Vertical Lookup) is a powerful Excel function used to search for a specific value in a table and return a corresponding value from another column within the same row. This function is especially useful for dynamically summarizing data from multiple tables where a common key value exists. For instance, when dealing with data across multiple sheets or tables, VLOOKUP can be employed to look up a key (such as an ID or code) and bring back relevant information, such as totals or specific metrics, from various sources. This is critical in scenarios like reporting or analysis where data from different departments or systems need to be consolidated based on a common identifier. Why Other Options Are Incorrect: • A) INDEX: While INDEX can return values from a specified row and column based on its position, it doesn’t inherently connect data from multiple tables as effectively as VLOOKUP does by matching a key value across tables. • B) SUMIF: SUMIF is used for summing values that meet specific criteria within a single range, but it does not perform lookups across multiple tables or sheets. • D) IFERROR: IFERROR is used for handling errors and is not relevant to the task of looking up values across multiple tables. • E) CONCATENATE: CONCATENATE is used to join text strings from multiple cells into a single cell, not for lookups or data summarization.
Which SOLID principle ensures that a class has only one reason to change?
Which page replacement algorithm minimizes the number of page faults theoretically but is difficult to implement in practice?
Which of the following best describes Abstraction in Object-Oriented Programming (OOP)?
What is a "collision" in the context of hashing?
 Which graph traversal algorithm uses a queue to explore vertices in a layer-by-layer fashion?
In C++, which access specifier makes members accessible only from within the class itself and from friend functions/classes?
What is the primary purpose of a B+ Tree in a database management system?
Which of the following is a primary feature of Mobile Computing?
Which of the following best differentiates between server-based virtualization and hypervisor-based virtualization?
KMP pattern matching avoids: